Qmake: fix escape sequence for a text define
Qmake: fix escape sequence for a text define

enna-project/Enna-Media-Server,raoulh/Enna-Media-Server,raoulh/Enna-Media-Server,enna-project/Enna-Media-Server,raoulh/Enna-Media-Server,raoulh/Enna-Media-Server,enna-project/Enna-Media-Server,enna-project/Enna-Media-Server,enna-project/Enna-Media-Server,raoulh/Enna-Media-Server